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How to reindex indexer programmatically in magento 2?

Just create PHP file under your module’s Cron folder,
A created module like Rbj_Indexing for reference, Create Indexer.php file and call execute() function,

<?php
namespace Rbj\Indexing\Cron;

class Indexer
{
    public function __construct(
        \Magento\Indexer\Model\Processor $processor
    ) {
        $this->processor = $processor;
    }

    public function execute()
    {
        /* Regenerate indexes for all indexers */
        $this->processor->reindexAll();

        /* Regenerate indexes for all invalid indexers */
        $this->processor->reindexAllInvalid()
    }
}

There are two types of method for indexing.

1. Regenerate indexes for all indexers
$this->processor->reindexAll();

2. Regenerate indexes for all invalid indexers. This will only regenerate for invalid indexer.
$this->processor->reindexAllInvalid()

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How to clean or flush cache programmatically in magento 2?

Many times we need to clear cache programmatically or using an external script, Using below code snippet we can clear of flush cache programmatically,

<?php
namespace Rbj\Cache\Block;

class CacheClear extends \Magento\Framework\View\Element\Template
{
    public function __construct(
        \Magento\Framework\View\Element\Template\Context $context,
        \Magento\Framework\App\Cache\Frontend\Pool $cacheFrontendPool,
        \Magento\Framework\App\Cache\TypeListInterface $cacheTypeList,
        array $data = []
    ) {
        $this->_cacheFrontendPool = $cacheFrontendPool;
        $this->_cacheTypeList = $cacheTypeList;
        parent::__construct($context, $data);
    }

     /* Using Product id */
    public function cacheClear()
    {
        /* get all types of cache in system */
        $allTypes = array_keys($this->_cacheTypeList->getTypes());

        /* Clean cached data for specific cache type */
        foreach ($allTypes as $type) {
            $this->_cacheTypeList->cleanType($type);
        }

        /* flushed the Entire cache storage from system, Works like Flush Cache Storage button click on System -> Cache Management */
        foreach ($this->_cacheFrontendPool as $cacheFrontend) {
            $cacheFrontend->getBackend()->clean();
        }
    }
}

Call function like below,
$productStockById = $block->cacheClear();

Get the list of all cache type by just below way,

$allTypes = array_keys($this->_cacheTypeList->getTypes());

Result like below type of all cache,

List of cache types:
array('config','layout','block_html','collections','reflection','db_ddl',
            'eav', 'customer_notification','config_integration','config_integration_api','full_page', 'translate', 'config_webservice');

If you want to flushAll cache, Use below methods,

foreach ($this->_cacheFrontendPool as $cacheFrontend) {
    $cacheFrontend->getBackend()->clean();
}

 

 

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How to pass image data using Ajax request to server side in backend magento 2?

By default, Image data are not posted using Ajax call.

Only plain data will be passed as Ajax posts. if we need to pass image data using Ajax we need to call Ajax as below way,
Call jQuery using requirejs way in a backend template file.

Let’s create a simple example of the form, Continue reading “How to pass image data using Ajax request to server side in backend magento 2?”